User Guide

IoT into the Wild

9.3.2 Example – S2103 CO2, Temperature and Humidity Sensor

CO2, Temperature and Humidity Sensor measurement packet:

01 0410 80140700 01 0110 F4650000 01 0210 7C7D0100 3C4D

Part

Value

Raw Data

Description

CO2

01 0410 80140700

01 is the channel number.

0410 is 0x1004（little-endian byte order）,

which is the measurement ID for CO2.

80140700 is actually 0x00071480, whose

equivalent decimal value is 464000. Divide it

by 1000, and you will get the actual

measurement value for CO2 as 464 ppm.

Air

Temperature

01 0110 F4650000

01 is the channel number.

0110 is 0x1001（little-endian byte order）,

which is the measurement ID for air

temperature.

F4650000 is actually 0x000065F4, whose

equivalent decimal value is 26100. Divide it by

1000, and you will get the actual

measurement value for air temperature as

26.1 ℃.

Air Humidity

01 0210 7C7D0100

01 is the channel number.

0210 is 0x1002 (little-endian byte order),

which is the measurement ID for air humidity.

7C7D0100 is actually 0x00017D7C, whose

equivalent decimal value is 97660. Divide it by

1000, and you will get the actual

measurement value for air humidity as

97.66 ％RH.

CRC

3C4D

The CRC verification part.